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Primary Examiner: Demers, Arthur P.
Assistant Examiner:
Attorney: Street; Gary D., Lee; Walter J.

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Title: Process for preparation of urea autocondensation product

Abstract: Urea is pyrolyzed in a falling film reactor at a temperature of from about 180.degree. to about 240.degree.C. A short residence time in the reactor provides for good urea conversion with minimal formation of other autocondensation pyrolyzates.

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Inventors: Cook, Jr., William H. (Lake Jackson, TX, US)

Application Number: 530337
Filing Date: 1974-12-09
Publication_date: 1976-03-23
Assignee: The Dow Chemical Company (Midland, MI)
Primary Class(es): 564/38
Other Classes:
US Patent Ref:

2918467

Dec, 1959

Hibbitts et al.

260/553.

Other Refs: Other References: Mutzenburg et al., Chem. Eng., 1965, pp. 175-190.